CN215384153U

CN215384153U - Cardiopulmonary sound sensor

Info

Publication number: CN215384153U
Application number: CN202120977146.7U
Authority: CN
Inventors: 丁松森
Original assignee: Suzhou Zhongke Suheng Electronic Co ltd
Current assignee: Suzhou Zhongke Suheng Electronic Co ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-01-04
Anticipated expiration: 2031-05-10

Abstract

The utility model discloses a cardiopulmonary sound sensor which comprises a pickup assembly and a signal processing assembly electrically connected with the pickup assembly, wherein the pickup assembly comprises a shell and a transducer embedded at one end of the shell, the transducer and the shell surround to form a rear sound cavity, and the rear sound cavity is configured into an open cavity structure. The cardiopulmonary sound sensor effectively reduces the influence of environmental noise on the measurement result during cardiopulmonary sound measurement.

Description

Cardiopulmonary sound sensor

Technical Field

The utility model relates to the field of sensors, in particular to a heart and lung sound sensor.

Background

The sound-electricity sensor is an energy conversion device for converting sound and vibration signals into electrical signals, and is generally used in a sound monitor to pick up a target sound signal. In the actual use process of the acoustoelectric sensor, due to the existence of environmental noise, the effect of picking up a target sound signal is not good, so that the target signal is seriously distorted, and the subsequent processing operation is troublesome.

Particularly, when the acoustoelectric sensor is used in a cardiopulmonary sound monitor to pick up cardiopulmonary sounds, in environments with more noises such as hospitals, the acoustoelectric sensor can pick up two types of sounds, one type is external environment noises, and the other type is the cardiopulmonary sounds and the pulmonary sounds which need to be picked up.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a cardiopulmonary sound sensor which effectively reduces the influence of environmental noise on a measurement result during cardiopulmonary sound measurement.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides a cardiopulmonary sound sensor, including the pickup subassembly and with the signal processing subassembly that the pickup subassembly electricity is connected, the pickup subassembly includes the casing and inlays to be established the transducer of casing one end, the transducer with the casing is around forming the back sound chamber, the back sound chamber is configured to open type cavity structure.

Preferably, the housing includes an annular sidewall including a first opening, the transducer being embedded in the first opening.

Preferably, the housing further includes a bottom wall disposed opposite to the first opening and connected to the annular sidewall, the annular sidewall is provided with one or more through holes, and the annular sidewall, the bottom wall and the transducer surround to form a rear acoustic cavity having an open or semi-open cavity structure.

Preferably, the housing further comprises a second opening disposed opposite the first opening, and the annular sidewall and the transducer surround to form a rear acoustic cavity having an open cavity structure.

Preferably, a conductive film is closely attached to the outside of the transducer.

Preferably, the conductive membrane is made of a silica gel material.

Preferably, the signal processing assembly comprises a circuit board which is used for acquiring signals with the transducer so as to amplify the signals.

Preferably, the circuit board is mounted within the housing or outside the housing.

Preferably, the transducers include, but are not limited to, piezoelectric transducers, electret transducers, MEMS transducers.

Compared with the prior art, the utility model has the following advantages:

according to the cardiopulmonary sound sensor, the rear sound cavity is set to be an open type or semi-open type cavity structure, cardiopulmonary sound is transmitted to the outer side surface of the transducer through skin, meanwhile, environmental noise is transmitted to the outer side surface of the transducer, the environmental noise is transmitted to the inner side surface of the transducer through the open type rear sound cavity, the influences of the noise on the vibrating diaphragms of the transducer by the noise on the inner side and the noise on the outer side can be mutually offset, the transducer only keeps vibration transmitted through the skin, and therefore the effect of reducing the noise is effectively achieved, the product structure is simplified, and the product cost is reduced.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the utility model as a matter of case. In the drawings:

fig. 1 is a schematic structural diagram of a cardiopulmonary sound sensor according to a first embodiment of the present invention;

FIG. 2 is an exploded view of a cardiopulmonary sound sensor in accordance with a first embodiment of the present invention;

FIG. 3 is a cross-sectional view of a cardiopulmonary sound sensor in accordance with a first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a pickup assembly according to a second embodiment of the present invention;

fig. 5 is an exploded view of a pickup assembly according to a second embodiment of the present invention;

fig. 6 is a sectional view of a pickup assembly according to a second embodiment of the present invention.

Shown in the figure:

11. a housing; 111. an annular sidewall; 112. a first opening; 113. a second opening; 114. a bottom wall; 115. a through hole; 12. a transducer; 13. a rear acoustic chamber; 14. a conductive membrane; 21. a circuit board.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 6, the present invention provides a cardiopulmonary sound sensor, which includes a sound pickup assembly and a signal processing assembly electrically connected to the sound pickup assembly, wherein the sound pickup assembly includes a housing 11 and a transducer 12 embedded at one end of the housing 11, the transducer 12 and the housing 11 surround to form a rear acoustic cavity 13, and the rear acoustic cavity 13 is configured as an open cavity structure.

The outside of transducer 12 is closely laminated with conduction membrane 14, and conduction membrane 14 preferably adopts the silica gel material to make, and the comfort level is higher when contacting with the human body, and the transmission sound is more sensitive, improves the accuracy of auscultation. The transducers 12 include, but are not limited to, piezoelectric transducers, electret transducers, MEMS transducers, and the like.

The signal processing assembly comprises a circuit board 21 which collects signals with the transducer 12 to amplify the signals, and the circuit board 21 is connected to an external application circuit through a lead. The circuit board 21 can be installed in the housing 11 and integrally arranged with the pickup assembly, for example, the circuit board is bonded inside the housing 11 by glue, the bonded position does not affect the open cavity structure of the rear acoustic cavity, and a signal output lead of the circuit board 21 is led out through a lead hole formed in the housing 11 and connected to an external application circuit; or can be installed outside the shell 11 and arranged separately from the pickup assembly.

When measuring heart sound or lung sound, 14 lateral surfaces of conduction membrane and human body contact, the heart lung sound passes through skin and 14 transmission to transducer 12 of conduction membrane with the vibration form, environmental noise also can pass through the lateral surface of 14 transmission to transducer 12 of conduction membrane simultaneously, back vocal cavity 13 through having open type cavity structures, let environmental noise get into back vocal cavity 13 and transmit to the medial surface of transducer 12, the noise of inside and outside both sides can offset each other to the vibrating diaphragm influence of transducer 12, transducer 12 has only kept the vibration through the skin transmission, thereby reach the effect of noise reduction.

Example one

As shown in fig. 1 to 3, in the present embodiment, the sound cavity 13 has a semi-open cavity structure. Specifically, the housing includes an annular sidewall 111 and a bottom wall 114 connected to the annular sidewall 111, the annular sidewall 111 includes a first opening 112, the first opening 112 is disposed opposite to the bottom wall 114, the annular sidewall 111 is provided with one or more through holes 115, and the size and shape of the through holes are not limited. The transducer 12 is embedded in the first opening 112, the conductive film 14 is tightly attached to the outer side surface of the transducer 12, and the annular side wall 111, the bottom wall 114 and the transducer 12 surround to form the rear acoustic cavity 13 with an open or semi-open cavity structure. In this embodiment, the circuit board 21 and the sound pickup assembly are preferably designed as a single unit, and the circuit board 21 is adhered to the bottom wall 114 by glue, so that the circuit board 21 does not affect the through hole 115 to receive external noise.

During the use, 14 lateral surfaces of conduction membrane and human contact, cardiopulmonary sound passes through skin and conduction membrane 14 with the vibration form and transmits to transducer 12, environmental noise also can transmit to the lateral surface of transducer 12 through conduction membrane 14 simultaneously, let environmental noise get into back sound chamber 13 through a plurality of through-holes 115 of seting up on annular lateral wall 111 and transmit to the medial surface of transducer 12, the noise of inside and outside both sides can offset each other to the vibrating diaphragm influence of transducer 12, transducer 12 has only kept the vibration through the skin transmission, thereby reach the effect of noise reduction.

Example two

As shown in fig. 4 to 6, in the present embodiment, the rear acoustic cavity 13 of the sound pickup assembly has a fully open cavity structure. Specifically, the housing 11 includes an annular sidewall 111, and the annular sidewall 111 includes a first opening 112 and a second opening 113 opposite to the first opening 112, and preferably, the first opening 112 and the second opening 113 are the same size. The transducer 12 is embedded in the first opening 112, the conductive film 14 is tightly attached to the outer side surface of the transducer 12, and the annular side wall 111 and the transducer 12 surround to form a rear acoustic cavity 13 with an open cavity structure. In this embodiment, the circuit board 21 and the sound pickup assembly are preferably designed separately, so that the rear sound cavity 13 can completely receive external noise through the second opening 113.

During the use, 14 lateral surfaces of conduction membrane and human body contact, cardiopulmonary sound passes through skin and conduction membrane 14 with the vibration form and transmits to transducer 12, environmental noise also can transmit to the lateral surface of transducer 12 through conduction membrane 14 simultaneously, let environmental noise get into back sound chamber 13 through the second opening 113 that includes at annular side wall 111 and transmit to the medial surface of transducer 12, the noise of inside and outside both sides can offset each other to the vibrating diaphragm influence of transducer 12, transducer 12 has only kept the vibration through the skin transmission, thereby reach the effect of noise reduction.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter that is disclosed herein is not intended to forego such subject matter, nor should the applicants be construed as having contemplated such subject matter as being part of the disclosed subject matter.

Claims

1. The utility model provides a cardiopulmonary sound sensor which characterized in that, including the pickup subassembly and with the signal processing subassembly that the pickup subassembly electricity is connected, the pickup subassembly includes the casing and inlays to be established the transducer of casing one end, the transducer with the casing is around forming back sound cavity, back sound cavity is configured into open type cavity structure.

2. The cardiopulmonary sound sensor of claim 1, wherein the housing includes an annular sidewall, the annular sidewall including a first opening, the transducer being embedded within the first opening.

3. The cardiopulmonary sound sensor of claim 2, wherein the housing further comprises a bottom wall disposed opposite to the first opening and connected to the annular side wall, the annular side wall has one or more through holes, and the annular side wall, the bottom wall and the transducer surround a rear acoustic cavity having an open or semi-open cavity structure.

4. The cardiopulmonary sound sensor of claim 2, wherein the housing further comprises a second opening disposed opposite the first opening, the annular sidewall and the transducer surrounding a rear acoustic cavity having an open cavity structure.

5. The cardiopulmonary sound sensor of claim 3 or 4, wherein the transducer has a conductive membrane tightly fitted on the outside.

6. The cardiopulmonary sound sensor of claim 5, wherein the conductive membrane is made of a silicone material.

7. The cardiopulmonary sound sensor of claim 1, wherein the signal processing assembly includes a circuit board that performs signal acquisition with the transducer to amplify the signal.

8. The cardiopulmonary sound sensor of claim 7, wherein the circuit board is mounted within or outside the housing.

9. The cardiopulmonary sound sensor of claim 1, wherein the transducers comprise, but are not limited to, piezoelectric transducers, electret transducers, MEMS transducers.